Journal ArticleDOI
Activation of Peroxymonosulfate by Benzoquinone: A Novel Nonradical Oxidation Process
TLDR
Findings have important implications for the development of novel nonradical oxidation processes based on PMS, because 1O2 as a moderately reactive electrophile may suffer less interference from background organic matters compared with nonselective •OH and SO4•-.Abstract:
The reactions between peroxymonosulfate (PMS) and quinones were investigated for the first time in this work, where benzoquinone (BQ) was selected as a model quinone. It was demonstrated that BQ could efficiently activate PMS for the degradation of sulfamethoxazole (SMX; a frequently detected antibiotic in the environments), and the degradation rate increased with solution pH from 7 to 10. Interestingly, quenching studies suggested that neither hydroxyl radical (•OH) nor sulfate radical (SO4•–) was produced therein. Instead, the generation of singlet oxygen (1O2) was proved by using two chemical probes (i.e., 2,2,6,6-tetramethyl-4-piperidinol and 9,10-diphenylanthracene) with the appearance of 1O2 indicative products detected by electron paramagnetic resonance spectrometry and liquid chromatography mass spectrometry, respectively. A catalytic mechanism was proposed involving the formation of a dioxirane intermediate between PMS and BQ and the subsequent decomposition of this intermediate into 1O2. Accordi...read more
Citations
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Journal ArticleDOI
Activation of persulfate (PS) and peroxymonosulfate (PMS) and application for the degradation of emerging contaminants
Jianlong Wang,Shizong Wang +1 more
TL;DR: Sulfate radical-based advanced oxidation processes (AOPs) have received increasing attention in recent years due to their high capability and adaptability for the degradation of emerging contaminants as mentioned in this paper.
Journal ArticleDOI
Generation of sulfate radical through heterogeneous catalysis for organic contaminants removal: Current development, challenges and prospects
TL;DR: In this paper, the authors provide a state-of-the-art review on the development in heterogeneous catalysts including single metal, mixed metal, and nonmetal carbon catalysts for organic contaminants removal, with particular focus on peroxymonosulfate (PMS) activation.
Journal ArticleDOI
Application of peroxymonosulfate and its activation methods for degradation of environmental organic pollutants: Review
Farshid Ghanbari,Mahsa Moradi +1 more
TL;DR: A literature review on environmental application of peroxymonosulfate (PMS) in degradation of contaminants to clarify the performance of PMS is carried out in this paper, which describes the PMS usage in remediation of environmental pollutants with focus on the different methods of activation and the effect of main operational parameters on PMS-based processes.
Journal ArticleDOI
Persulfate-Based Advanced Oxidation: Critical Assessment of Opportunities and Roadblocks.
TL;DR: This Critical Review comparatively examines the activation mechanisms of peroxymonosulfate and peroxydisulfates and the formation pathways of oxidizing species and the impacts of water parameters and constituents such as pH, background organic matter, halide, phosphate, and carbonate on persulfate-driven chemistry.
Journal ArticleDOI
Metal-free carbocatalysis in advanced oxidation reactions
TL;DR: This Account showcases the recent contributions to metal-free catalysis in advanced oxidation, including design of nanocarbon catalysts, exploration of intrinsic active sites, and identification of reactive species and reaction pathways, and offers perspectives on carbocatalysis for future environmental applications.
References
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Journal ArticleDOI
Oxidation of pharmaceuticals during water treatment with chlorine dioxide
TL;DR: Overall, the results indicate that ClO2 will only be effective to oxidize certain compound classes such as the investigated classes of sulfonamide and macrolide antibiotics, and estrogens.
Journal ArticleDOI
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Significance of phenolic compounds in plant‐soil‐microbial systems
José Oswaldo Siqueira,Muraleedharan G. Nair,Raymond Hammerschmidt,Gene R. Safir,Alan R. Putnam +4 more
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Journal ArticleDOI
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Johan Emelian Moan,Einar Wold +1 more
TL;DR: Investigation of the problem of how to detect 1O2 in neutral aqueous solutions involving the generation of stable nitroxide radicals when 2,2,6,6,-tetramethylpiperidin is found, found no radical production.
Journal ArticleDOI
Electrolytic manipulation of persulfate reactivity by iron electrodes for trichloroethylene degradation in groundwater.
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Radical generation by the interaction of transition metals with common oxidants.
Generation of sulfate radical through heterogeneous catalysis for organic contaminants removal: Current development, challenges and prospects
Application of peroxymonosulfate and its activation methods for degradation of environmental organic pollutants: Review
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